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Olivia's sister, Rachel, visits; Walter, Peter and Olivia try to solve the murder of an esteemed epidemiologist, which may be linked to Olivia's abduction.
First Air Date : Sep 09, 2008
Last Air date : Jan 18, 2013
Episode : 100 Episode
Season : 5 Season
Runtime: 46:14 minutes
Studio: FOX
Country: United States of America